• Code: 821
• Description: Self-diagnostic error - ASIC/CPU ASIC and CPU timer error detected during selfdiagnostic.
• Causes: • Defective controller
• Remedy: Replace the controller if the error is frequent.

• Code: 822
• Description: Self-diagnostic error HDD HDD timeout error detected during self-diagnostic.
• Causes: • Poor HDD connection • Defective HDD
• Remedy: 1. Check the HDD connection. 2. Replace the HDD.

• Code: 823
• Description: Self-diagnostic error . NIB NIB error detected during self-diagnostic.
• Causes: • Defective controller
• Remedy: Replace the controller.

• Code: 824
• Description: Self-diagnostic error. NVRAM NVRAM error detected during self-diagnostic.
• Causes: • Poor NVRAM connection
• Remedy: 1. Check if the NVRAM is properly installed. 2. Replace the NVRAM

• Code: 827
• Description: Self-diagnostic error - standard SDRAM Standard SDRAM (memory) error detected during self-diagnostic.
• Causes: • Defective controller
• Remedy: Replace the controller if the error is frequent.

• Code: 828
• Description: Self-diagnostic error - Flash ROM. Flash ROM error detected during self-diagnostic.
• Causes: • Defective controller
• Remedy: Replace the controller if the error is frequent.

• Code: 829
• Description: Self-diagnostic error - Optional RAM Memory RAM error detected during selfdiagnostic.
• Causes: • Poor connection of the optional memory • Defective memory RAM
• Remedy: 1. Check the connection of the optional memory. 2. Replace the memory DIMM.

• Code: 835
• Description: Self-diagnostic error - Parallel interface Parallel interface error detected during selfdiagnostic.
• Causes: • Defective controller
• Remedy: Replace the controller.